Tempo mark alignment

[Jay Anderson]

Is there a good workaround for issue 712:
<http://code.google.com/p/lilypond/issues/detail?id=712>?

The quickest solution is to just use '\override Score.MetronomeMark
#'X-offset = #-10', but this is fragile. Is there a way to tell the
MetronomeMark to align to the bar?

This same issue exists for multi-measure rests (not just for church rests):
\version "2.12.2"
\paper { ragged-right = ##f }
\score {
  \new Staff {
    \set Score.skipBars = ##t
    \tempo "Lento"
    R1*50 |
    \tempo "Asdf"
    R1 |
    \tempo "Allegro con brio"
    R1*50 |
  }
}

Would issue 684 fix this:
<http://code.google.com/p/lilypond/issues/detail?id=684>?

Thanks.

-----Jay